Fungi, Bacteria und Pathologie. 39 



dans les maladies non parasitaires (blessures, etc.); il croit que ces 

 oxydases ne sont pas une production directe du parasite, mais 

 plutöt un r^sultat d'une reaction du protoplasma de la plante vis ä 

 vis du parasite ou des substances veneneuses excretöes par lui. 



II est probable que les ferments oxydants qui se rencontrent 

 dans les organes de la vigne attaqu^e par le Pcronospora ont une 

 part ä la casse des vins. Montemartini (Pavia). 



Piper, C. V. and S. W. Fletcher, Root diseases of fruit and 

 other trees, caused by toadstools. (Bulletin ol" the 

 Washington agric. Experiment Station. No. 59. 1903.) 



The bulletin describes root rot of fruit trees caused by Armillaria 

 mellea, describing the manner in which trees are attacked, and me- 

 thods for preventing the same. A brief discussion is likevvise added 

 concerning another form of Armillaria mellea, which may possibly 

 be a different fungus. The name Armillaria mellea biilbosa is sug- 

 gested. von Schrenk. 



Pollock, J. B., Acanker of the yellow birchand a Nectria 

 associated with it. (Report Michigan Acad. Science. VII. 

 p. 55—56. 1905.) 



A disease of branches of yellow birch which is quite destructive 

 was found to have a species ofA'^ef/rm associated with it. This does 

 not seem to be Nectria cinnabarina nor A^. diti&sima but seemed 

 to correspond nearest to N. coccinea. Perley Spaulding. 



Reed, H. S., Three fungous diseases of the cultivated 

 Ginseng. (Missouri Agric. Expt. Stat. Bull. No. 69. October 

 1905.) 



The author describes the cultivation of ginseng and the causes 

 of three diseases of this plant, together with remedies. The diseases 

 are called: Stem anthracnose, caused by Vermicularia Dematiiim, 

 leaf anthracnose caused by Pestalozzia funerea, and wilt disease 

 caused by Neocosmospora vasinfecta. A technica! description with 

 figures follows the general account. von Schrenk. 



SwiNGLE, W. T., The prevention of stinking smut of wheat 

 andloosesmut of oats. (U. S. Dept. of Agr. Farmers Bul- 

 letin No. 250. 1906.) 



The stinking smut of wheat not only destroys a proportion of 

 the wheat, but also renders less salable sound wheat, because of 

 the disagreeable odor. Four treatments are recommended for pre- 

 venting this disease. These consist of soaking the grain in a mix- 

 ture of 15 Ibs. of flowers of sulphur, and '/^ pound of powdered 

 resin, which are wet with 6^/2 quarts of water, and to which are 

 added 10 !bs. of dry powdered caustic soda; enough water is added 

 to make the Solution 6 gallons. Seed wheat is treated by soaking 

 it in one part of this Solution diluted with 50 gallons of water, in 

 which the grain is soaked for 12 hours. Detailed directions are 

 given for making this Solution. 



The other treatments recommended are: with copper sulphate 

 and lime, and treatment with formalin or hot water. 



von Schrenk. 



